Defensive publication

ABSTRACT

PHOTOGRAPHIC SILVER HALIDE EMULSIONS CONTAIN A SENSITIZING COMBINATION COMPRISING A MEROCYANINE DYE HAVING AN IMINO GROUP ON THE ACIDIC NUCLEUS THEREOF, AND A PYRIDINE AND-OR A QUINOLINE BASE. THE PREFERRED MEROCYANINE DYES HAVE ONE OF THE FOLLOWING FORMULAS:   WHEREIN N AND M EACH REPRESENTS A POSITIVE INTEGER OF FROM 1 TO 2; L REPRESENTS A METHINE LINKAGE; D REPRESENTS AND OXYGEN ATOM, A SULFUR ATOM, A SELENIUM ATOM OR THE GROUP =N-R; R1, R2 AND R4 EACH REPRESENTS AN ALKYL GROUP OR AN ARYL GROUP; R3 REPRESENTS AN AMINO GROUP, AN ALKYL GROUP, AN ARYL GROUP, AN ACYL GROUP, AN ARYLSULFONYL GROUP, AN ALKOXYCARBONYL GROUP, A CARBOXYALKYLCARBONYL GROUP, A 5- TO 6-MEMBERED NITROGEN CONTAINING HETEROCYCLIC GROUP, AND THE GROUP   WHEREIN Z1, M, D, R1 AND R2 ARE AS ABOVE DEFINED; X REPRESENTS AN ACID ANION; AND Z1 AND Z2 EACH REPRESENTS THE NON-METALLIC ATOMS NECESSARY TO COMPLETE A NITROGEN CONTAINING THE HETEROCYCLIC NUCLEUS CONTAINING FROM 5 TO 6 ATOMS IN THE HETEROCYCLIC RING. A PREFERRED COMBINATION COMPRISES 3 - ETHYL-5((3-ETHYL-2-BENZOTHIAZOLINYLIDENE)ETHYLIDIENE)-2-P-CARBOXYPHENYLIMINO-4-THIAZOLIDINONE AND PYRIDINE.

DEFENSIVE PUBMCATTQN UNITED STATES PATENT OFFICE Published at therequest of the applicant or owner in accordance with the Notice of Dec.16, 1969, 869 O.G. 687. The abstracts of Defensive Publicationapplications are identified by distinctly numbered series and arearranged chronologically. The heading of each abstract indicates thenumber of pages of specification, including claims and sheets ofdrawings contained in the application as originally filed. The files ofthese applications are available to the public for inspection andreproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to themerits of alleged invention. The Patent Ofiice makes no assertion as tothe novelty of the disclosed subject matter.

PUBLISHED JULY 20, 1971 T888,0l6 PHOTOGRAPHIC MATERIALS Norman W.Kalenda, Kodak Park, Rochester, NY. 14650 Filed Dec. 4, 1970, Ser. No.95,419 Int. Cl. G03c N10 US. Cl. 96-126 No Drawing. 27 PagesSpecification Photographic silver halide emulsions contain a sensitizingcombination comprising a merocyanine dye having an imino group on theacidic nucleus thereof, and a pyridine and/ or a quinoline base. Thepreferred merocyanine dyes have one of the following formulas:

L=-(ort=oH-).. 11 :-R, wherein n and m each represents a positiveinteger of from 1 to 2; L represents a methine linkage; D represents anoxygen atom, a sulfur atom, a selenium atom or the group =N-R; R, R Rand R each represents an alkyl group or an aryl group; R represents anamino group, an al-kyl group, an aryl group, an acyl group, anarylsulfonyl group, an alkoxycarbonyl group, a carboxyalkylcarbonylgroup, a 5- to 6-membered nitrogen containing heterocyclic group, andthe group wherein Z m, D, R and R are as above defined; X represents anacid anion; and Z and Z each represents the non-metallic atoms necessaryto complete a nitrogen containing heterocyclic nucleus containing from 5to 6 atoms in the heterocyclic ring. A preferred combination comprises 3ethyl-5-[(3-ethyl-Z-benzothiazolinylidene)ethylidiene]-2p-carboxyphenylimino-4-thiazolidinoneand pyridine.

